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Finding the Fourth Proportional to 18,758.10, 28,133.10 and 8,228.10

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Solution

The fourth proportional to 18,758.10, 28,133.10 and 8,228.10 is: 12,340.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,758.10 : 28,133.10 = 8,228.10 : x
  2. Step 2: Convert to fraction form
    18,758.10/28,133.10 = 8,228.10/x
  3. Step 3: Cross multiply
    18,758.10x = 28,133.10 × 8,228.10
  4. Step 4: Simplify right side
    18,758.10x = 231,481,960.11
  5. Step 5: Solve for x
    x = 231,481,960.11/18,758.10
  6. Step 6: Final answer
    x = 12,340.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.